No, not naive, just unfamiliar. Electrical systems and circuits are designed with the assumption that the devices and appliances will not all hit their max load at the same time. The load is measured and limited by current (amperes, or amps). Any electrical thing that has a motor (fans, compressors, pumps) will draw about twice as many amps when starting as when it is stable running. Other devices like your converter or convection oven will cycle from low current draw to high when in use.
When you find yourself in extraordinary times and you're using all these things at once, it's possible that your ac compressor, water pump, converter, convection oven, etc, could all cycle on within a few seconds of each other, and this coincidence would slightly exceed the capacity of the circuit.
What you're seeing is just a very small scale example of why municipal grids experience brown outs on a hot summer day when everyone has their a/c on.
John & Diane, fulltiming since '12 02 DS, FL, Cat, '04 Element NHSO RVM103
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John and Diane (RIP Lincoln, 21 FEB 22) RVM103 NHSO
Fulltimers since June, 2012
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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