Far too many dropouts in Hoymiles when output is required

[futzicomp]

Hello Community, Thank you very much for this project, which I have been using since mid-2023.
I am working on a new system for my brother since Febr. 24:

1. DTUOB --> PV-->MPPT150/35--> Pylontech--> HM600@ 300W
2. DTUOB[2] PV(2) --> HM -600 @400W // PV(3) --> HM-1500 @200W

All inverters are connected to each other in one row / string. The configuration allows the daytime demand to be covered mainly by (2) and feed in via (1) in the evening. ( I know this config is stupid!)

I have set up a new home assistant for my brother. I noticed the following: As soon as the HM600 (1) gets busy and the other inverters are also active, massive dropouts occur. The other WRs are not affected. As soon as the WR(1) has nothing more to do, the dropouts decrease significantly.
All other messages on DTU(1) always arrive undisturbed.

Do you have any idea what this could be and how I can eliminate it? I also think that openDTU itself is also affected by the dropouts.

Vergrößerung:

but if there is nothing to do, there are "only" two drops per 30 minutes.

Was kann ich tun um dem Problem auf die Spur zu kommen? Habt Ihr Ideen? / Do you have any ideas?

Thanks for your help in advance

[futzicomp]

I found some strange things in the console protokoll. Maybe this helps you?

DTU Konsole.txt