When I started the test yesterday, the contest page took 12 minutes to load, for the first puzzle to show up. And the submission of the first answer took more than 2 minutes. In between I checked my internet connection many times and all other web pages were refreshing as usual. And after the first submission, the score was shown as NaN. I was taking the online solve method, and certain Sudokus didn't load in the penpa_PLUS_ interface even after repeated tries as instructed. So I ended up trying to solve Sudokus which were loading and not the ones I wanted too.
Can the organizers check whether it was just the effect of heavy web traffic in LMI site due to the fact that it was just minutes before the deadline or whether there is a bug?

Anyway my performance was heavily affected due to this.

Maybe I should start earlier, not minutes before the deadline or is it wiser to revert to paper solving?

Thanks everyone for trying the puzzles! Hope you had fun solving them :-)

https://youtu.be/29ZJkWMEYEs

Video on XV No three in a row.