Indeed, i could retrigger the flow, but i prefer it to go at its own pace. To me it's more comfortable this way. For example, with the modbus nodes, it's much better as i don't have to deal with queue problems.
Indeed the flow starts again if i press the inject node. So it seems to be stuck somewhere in the request node that has timed out. Using an inject node could be a temporary fix, but would not fix the core problem imo.