OLED display gets cluttered after some time

[jonashoechst]

I've noticed on multiple devices, that the display becomes cluttered up after some time using the rf95modem. For reference there is a picture below.

Any idea what could introduce this bug?

[gh0st42]

Does this only happen on this specific device or also on other OLED devices?
Any easy way to reproduce it?

At one point in time, I had to switch the OLED lib as the old one was discontinued.
So far, I never had these pixel bugs on my devices even after running for days.

Does calling resetDisplay() help?
Does the display repair itself after a few clear() calls when new packets are incoming?

[jonashoechst]

Does this only happen on this specific device or also on other OLED devices?
Any easy way to reproduce it?

This is happening on various devices of TTGO. I've just noticed it gets worse each time receiving a message.

Does the display repair itself after a few clear() calls when new packets are incoming?

No, clearly this does not help, vice versa it seems that on receiving the display gets obstructed in the first place.

Just as a side note: I've updated the OLED library to version 4.2.1 locally, which also does not help for this issue.

[jonashoechst]

It seems to be a BLE related problem. If no device is connected through BLE, the display seems to be perfectly fine, whereas with a connected device re-rendering seems to introduce the visual distortion.