"Hotend Idle Timeout" issue

Hi gurus!

I'm having a random issue with my Ender3V2 and Octoprint (1.5.3).

Sometimes, not in every print, happen that I get the notification error "Hotend Idle Timeout", bed and hotend lose their temperatures, status of the print remains "printing" and that's it. I cannot do enything, I tried to put in Pause but printer state changes to Pausing and nothing else happen. I cannot even restart it, just switch off the printer...)

This is the log until the issue happened:
2021-02-03 08:10:38,554 - octoprint.plugins.tracking - INFO - Sent tracking event print_started, payload: {'origin': 'local', 'file': '6667d12323fd52ba1a8ab97ddc69a86763b14945', 'throttled_now': False, 'throttled_past': True, 'throttled_mask': 327680}
2021-02-03 08:10:44,797 - octoprint.plugins.excluderegion - INFO - Printing started
2021-02-03 08:10:44,797 - octoprint.plugins.smartfilamentsensor - INFO - Connection test is not running
2021-02-03 08:10:44,820 - octoprint.plugins.DisplayLayerProgress - INFO - Store layer count in MetaFile
2021-02-03 08:10:44,947 - octoprint.plugins.DisplayLayerProgress - INFO - Read total height from MetaFile
2021-02-03 08:10:44,968 - octoprint.plugins.DisplayLayerProgress - INFO - Store layer count in MetaFile
2021-02-03 08:10:45,109 - octoprint.plugins.DisplayLayerProgress - INFO - Read total height from MetaFile
2021-02-03 08:10:55,368 - octoprint.plugins.smartfilamentsensor - INFO - Motion sensor started: Distance detection
2021-02-03 08:11:21,472 - octoprint.plugins.action_command_notification - INFO - Got a notification: 0% L=0/313
2021-02-03 08:13:17,044 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.86.58
2021-02-03 08:13:17,102 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.86.58
2021-02-03 08:13:17,196 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.86.58
2021-02-03 08:19:12,921 - octoprint.plugins.action_command_notification - INFO - Got a notification: 2% L=0/313
2021-02-03 08:24:22,104 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2021-02-03 08:24:29,403 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 65708}
2021-02-03 08:27:41,341 - octoprint.plugins.action_command_notification - INFO - Got a notification: 3% L=0/313
2021-02-03 08:30:34,256 - octoprint.plugins.action_command_notification - INFO - Got a notification: 3% L=1/313
2021-02-03 08:31:33,614 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:5.89.193.233
2021-02-03 08:31:33,719 - octoprint.server.util.flask - INFO - Passively logging in user ungarelli from ::ffff:5.89.193.233
2021-02-03 08:31:33,720 - octoprint.access.users - INFO - Logged in user: ungarelli
2021-02-03 08:31:33,789 - octoprint.server.util.sockjs - INFO - User ungarelli logged in on the socket from client ::ffff:5.89.193.233
2021-02-03 08:31:36,780 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:5.89.193.233
2021-02-03 08:33:24,985 - octoprint.plugins.smartfilamentsensor - INFO - M83: Relative extrusion
2021-02-03 08:33:25,954 - octoprint.plugins.smartfilamentsensor - INFO - M82: Absolut extrusion
2021-02-03 08:35:11,549 - octoprint.plugins.action_command_notification - INFO - Got a notification: 5% L=1/313
2021-02-03 08:35:20,835 - octoprint.plugins.action_command_notification - INFO - Got a notification: 5% L=2/313
2021-02-03 08:37:56,652 - octoprint.plugins.smartfilamentsensor - INFO - M83: Relative extrusion
2021-02-03 08:37:57,542 - octoprint.plugins.smartfilamentsensor - INFO - M82: Absolut extrusion
2021-02-03 08:39:22,104 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2021-02-03 08:39:29,405 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 66608}
2021-02-03 08:39:49,584 - octoprint.plugins.action_command_notification - INFO - Got a notification: 5% L=3/313
2021-02-03 08:40:03,441 - octoprint.plugins.action_command_notification - INFO - Got a notification: 6% L=3/313
2021-02-03 08:42:27,749 - octoprint.plugins.smartfilamentsensor - INFO - M83: Relative extrusion
2021-02-03 08:42:28,622 - octoprint.plugins.smartfilamentsensor - INFO - M82: Absolut extrusion
2021-02-03 08:44:28,174 - octoprint.plugins.action_command_notification - INFO - Got a notification: 6% L=4/313
2021-02-03 08:44:45,853 - octoprint.plugins.action_command_notification - INFO - Got a notification: 7% L=4/313
2021-02-03 08:47:01,881 - octoprint.plugins.smartfilamentsensor - INFO - M83: Relative extrusion
2021-02-03 08:47:03,205 - octoprint.plugins.smartfilamentsensor - INFO - M82: Absolut extrusion
2021-02-03 08:48:48,727 - octoprint.plugins.action_command_notification - INFO - Got a notification: 7% L=5/313
2021-02-03 08:50:18,491 - octoprint.plugins.action_command_notification - INFO - Got a notification: 8% L=5/313
2021-02-03 08:51:22,797 - octoprint.plugins.smartfilamentsensor - INFO - M83: Relative extrusion
2021-02-03 08:51:24,192 - octoprint.plugins.smartfilamentsensor - INFO - M82: Absolut extrusion
2021-02-03 08:54:22,105 - octoprint.server.heartbeat - INFO - Server heartbeat <3
2021-02-03 08:54:29,379 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 67508}
2021-02-03 08:56:52,465 - octoprint.plugins.action_command_notification - INFO - Got a notification: Hotend Idle Timeout

I'm using https://marlin.crc.id.au/ firmware "Ender3-V2-BLTouch-20210129.bin"

Any suggestion?

Many thanks,
Stefano

Please try a stable build, not a nightly firmware first.

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