If it is not critical for anyone to overload it once a week, then it is normal. Regarding the range - I have a linear two-room apartment, where the router hangs in the corner of the apartment. So in one room there are no problems, but in the far room - horror! In the corners of the communication room, there is no 5 GHz at all, and 2.4 barely catches. Although neighboring routers catch 4 out of 5 even from the lower floors.
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