No hot water at end tap unless another tap runs—pressure or flow issue in plumbing?

Hello,
Recently, only cold water flows from the tap that I have at the very end of my installation.
The only way to get hot water out of it is to "fire" warm water from another tap - then the last one "catches" and everything is fine.
I thought that the problem may be related to too little water pressure, so I turned on all the valves (they were at about 50%), but to no avail.

I exclude problems with the membrane in the junker, because in the other sinks the water flows without any problems.

any advice? any tips? Can't do without a specialist?
I will be grateful
best regards

Moderated By DonRomano:

Does your friend have any problem with the PC keyboard and Polish letters? Please correct the post.

What about the strainer (aerator) in the faucet itself?
If it works at other water intake points, why shouldn't it work at this one?

Perhaps it is clogged with pebbles somewhere, you can do it at home by turning off the main water supply, turning off all working taps, turning on the hot tap in the clogged tap and blowing it or rinsing it with water, but first check the strainer and batteries.

I unscrewed the strainer from the battery, what was my surprise when, after cleaning it, the hot water tap worked :}
Thank you for your help