Wrong Heart rate on optical sensor. FW 18.26

I assume the first graph is the wrong one where the HR suddenly steps up from 160 to 185 just before the 8 minute mark?

Do you have the cadence graph for that one?

you are partially right. There are also questions about the first graph. but at least it shows the work of the heart within my real working limits at an average pace of 4:00, which is 180 beats per minute

the problem persists. Today I did acceleration and the first acceleration showed a true result of 180 beats per minute. the rest are incorrect!
Maybe someone is experiencing similar problems?

Same problem, using both OHR and Garmin HRM PRO chest strap (configured as auxiliary HR so can view/record both at same time), OHR under-reads by 30bpm then suddenly 'acquires' after around 10 minutes, prior to v18.22 it used to acquired within about 1 minute which is much more acceptable. Currently trying to find a way to retrograde to v18.15 beta which looks like it might be the last version before it broke...

Using following data field from Garmin Connect IQ  apps.garmin.com/.../a461bc0d-828d-47c8-a4a5-8d014b5fedc9 need to unpair the chest HRM then watch uses the OHR and the auxiliary app 'finds' and uses the chest HR automagically and presenting it as aux HR, can create a screen with both, and both are recorded and can be viewed in chart afterwards, it is enlightening!

Just recorded this tonight, OHR took about 18 min to acquire 

I did 3 runs with auxiliary HR from the strap and three different ways of wearing FR (very tight, tight and comfortably loose but not dangling) - all three readings are within 1 bpm of difference, graphs are perfectly aligned.

This doesn't happen every time. Perhaps in 10% of cases. I only had a couple of times, once I had an elevated pulse during a recovery run - the pulse was about 140, although it should have been no more than 110-120, it lasted about 10 minutes, then the pulse jumped to normal 110. The second time was in the third hour of the mountain hikes - I felt my pulse was below 100, it was flat way, but after 2 hours of normality the watch began to show higher than my possible maximum - from 180 to 205, although my maximum is 182. This lasted about forty minutes - removing them from my hand did not help, only when I came up the next uphill, the pulse jumped back to normal - 128-140.