Sensors only show data when part context menu is open in KSP

[Row-Bear]

Using KSP 1.9.1 and Telemachus 1.7.64

Sensors only update values when the part context (right click) menu is open.
In below screenshot, I right clicked the temperature sensor as it had rotated out of sunlight.
The graph shows the temperature gradually dropping.

In this screenshot, the right click menu was not open, and the value did not update.
After right clicking, it suddenly updated

The same happens also with the acceleration sensor.

[Row-Bear]

I think this is also the issue behind the remark for release 1.7.2
"Sensors should report again! You may have to toggle the sensors off/on when switching vessels."
When switching from space center to a vessel, sensors don't show data. But, no need to toggle them on and off, just opening the part context menu is enough.

[StoneBlue]

Weird...I wasnt having the first issue. Everything seems to be working for me in that regard.
Also, didnt have the 2nd issues when switching from vessel to EVAd kerbal, and back again.
Havent tried switching between craft, or scenes yet, tho.

[Row-Bear]

I tested it with Telemachus 1.7.2 and 1.7.64 on both KSP 1.8.1 and 1.9.1, it occurs on all combinations for me.

[Row-Bear]

I was trying another mod (Graphotron), which draws graphs in game.
Interestingly, it has the same problem.
The readout value for the sensor only updates when the context menu is open.

To me, it looks like a KSP bug.