Cuban blues?

[Swe_Richard 1,172]

Thought I'd shout out to the fine people in this forum because I am kind of dazed and confused. 

I've been flying the HJet and the MD82 for the past 30 or so flights (ranging from 80 to 1200 nm hops). Performance has been stellar and because of this I've told myself I won't join the latest beta. I've gone more or less all across Europe during these flights. Even the more congested places such as Paris, Berlin and London. Now I am in the Caribbean (courtesy of OnAir and the missions therein). I am suffering some weird microstuttering over Cuba atm. Performance is really shoddy in a way I haven't experienced in a long while in this sim. Flying at 39k feet in the HJet over Cuba gives me this odd stuttering. Is there a known issue over Cuba/in the Caribbeans I have totally missed?

EDIT: Leaving Cuba the performance increases. 

Edited July 13, 2022 by Swe_Richard
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[Swe_Richard 1,172]

Update:

I think Cuba is innocent and the issue was the flight plan (made by MSFS as I was piloting the HJet and using the in built flight planner). 

Noticed the flight plan had some issues and ended up deleting it from the FMS. Lo and behold; back to my usual smooth performance after that.