02:35:31.990: Output 'adv_stream': Number of lagged frames due to rendering lag/stalls: 9 (0.0%)
02:35:31.990: Output 'adv_stream': Number of dropped frames due to insufficient bandwidth/connection stalls: 9161 (26.1%)
02:35:31.991: Video stopped, number of skipped frames due to encoding lag: 17/35077 (0.0%)
Your rendering and encoding lag is well within acceptable levels, less than 0.1%.
Your connection has a major problem, and is unable to stream consistently at your chosen bitrate.
You are streaming over Wifi, which is NEVER recommended. Wifi is designed for lightweight non-critical content consumption, and should not be considered a replacement for a proper network cable. It's extremely susceptible to interference.
This also may be due to insufficient baseline throughput (again, speed test sites are useless for livestreamers, they test
peak speed, not minimum), intermittent packet loss, ISP throttling, or just a bad node somewhere in your route to the ingest server.
Being on Wifi is the first thing to eliminate though.
After you're on a network cable, use the TwitchTest tool above. You want a server with a Quality score of 80 or above, prefer 100.