Wireless beacon interval and DTIM missing

SUP-10676 in new ticketing system.

+1

I remember seeing this option a few years ago, but now it is removed.

I think it would be useful to have this, or to have a small random offset to the default beacon interval.
I observe “waves” of “lost connection, no beacons received” on point-to-point links running with a CCQ around 80%.
I checked, and e.g. on a point-to-point link where 4 SSIDs are sent by the AP (3 virtual interfaces), I can see over time that 2 or 3 are received OK, one or two others disappear.
I guess there is some local indoor AP that beacons exactly at the same time as one of the local APs is transmitting, and they go under in the interference.
This continues maybe half an hour, and after that the connection is OK again. Probably the moment of transmission of the beacons has drifted by that time.
When we could set the beacon transmission time e.g. to 210ms instead of 200ms, and that local AP uses 200ms, this kind of problem could be resolved.

On many forums it is recommended to change the DTIM regarding the iPhone, but how? The iPhone 6 kept disconnecting and connecting, resolved on the iphone forums. . . . . but mikrotik has it in the ass.
The last plastic router also has this setting. . . .

This ?
I don’t have iPhones at home, so I don’t use it.
Be advised that’s on a wifiwave2 device, though.

DTIM.jpg