DLOG runtime in overlay doesn't update or shows wrong value

[fietser28]

If I use DLOG to log MIO168 channels (don't know if this is relevant) at a 1s interval, then the overlay windows does update the data size (KB) every second but it doesn't update the time the DLOG is running (min/sec):

This is annoying if you want to run some long timed measurements.

Manually switching to a different screen and back (forcing the main display to show again) the time data is displayed updated but not completely correct. The example below was taken right after the DLOG screen showed the measurement was running 900 seconds (= 15 min, 0 seconds) and I switched to the main screen again:

At some irregular intervals (between 30s and 2 minutes?) the overlay updates without any user intervention.

Running latest GitHub commit firmware build from source.