Volume fader locked to a value when reading automation

EDIT - Solved:

After going to Proejct Settings > Project Duration:

and expanding it to 3 hours, I found a hidden automation point that was probably put there previously and forgotten.

Hi,

I have a Drums group channel which ±12 channels routed to it.

When reading automation (have R green) and trying to change the volume value of the group or any other group channel channel that’s routed to it - the value bounces back to a specific one.

e.g. can’t change the volume value of TOMS group that’s routed to Drums GRP, but can change the values of Tom 1 and Tom 2 which are routed to TOMS.

There is no visible automation on the Drums GRP, however when I disable the R automation, change the volume and then hit Read again - the volume changes to a specific value.

What am I missing?