Modbus Errors

Hey I am using HA for quite a while to drive modbus relays

I am receiving some errors and some comments regard
Updating modbus switch took longer than the scheduled update interval 0:00:30

and some times no response,

I have found issue on Git


which is relevant for this failure, anyone have a solution ?

what is the recommended speed to use modbus?

how to eliminate the failures?

Does it means modbus with HA should be neglected?