Playhead (green line) lagging or disappear

I am new to using Dorico.
I have just purchased and downloaded version 4 (Elements) and I am having a serious problem with the playhead (green line).

It suddenly disappears in play mode or lags very badly but does not affect the sound which continues to play without any problem.

The strange thing is that if I scroll at the same time as the playback is going on, it smoothes out the movement of the bar.

This is very annoying for proper use of the software, I hope there is a solution.

I hope there is a solution. Has anyone experienced this problem?
Is there a way to solve the problem?

Thank you for your attention, I hope to read you soon.

MacbookPro 2018
I7 2,6GHZ
MACOS Catalina

Welcome to the forum, @Xavier_g. This isn’t a problem I recall being reported before. To be sure I understand: you find that the playhead only draws while the page itself is moving, i.e. when you manually scroll it or drag it around, and otherwise it disappears during playback if the page is still?

Hi dspreadbury,
Thanks for your fast answer.
Yes, that’s the problem. Any idea to fix it?

No, I must say I’ve no idea what could cause that. Does your MacBook Pro offer any options in System Preferences for the use of the discrete GPU or the integrated graphics? If so, perhaps try changing that?

Thank you for your reply,
I have made the change you indicated about the graphics card, but nothing changes.

I put an example here in pictures.
Screen Recording 2022-04-17 at 08.47.51 (1)

And here, one other :
Screen Recording 2022-04-17 at 08.46.18 (1)

I’m afraid I don’t have any other ideas at the moment. I’ll talk to the team after the holiday weekend to see if they have any thoughts.

Ok, thank you.
I am looking forward to hearing from you.

Any news?

No, I’m afraid not as yet.