Although it's said in the editor that a maximum length of a synopsis is 100 characters, there is no actual limit of the field. I consider this a bug.
Additionally, other fields also should have a max number of characters set. Otherwise, it breaks SE layout:

and looks bad in a splash screen (especially Authors)

The title should not ever be longer than 1 line so it doesn't cover potential expansions line. I think a list of languages should be moved next to expansions list as per example screenshot problem. The Synopsis should never cover Difficulty nor Duration.
T̠͟e͇͍͍̟x̯̝͔͞t̖̥̫͙͓̝̕ ͉͖i̘̦͇ṉ̩̤̫͔̹͜s͙̮͘e̫̰͓̱̥͙r̥̠̤͞ti͓͚o̭̬͓̟͢n̦̞̭̫̹̬ͅ ͕̞i͏̥͇̰s̢͕̣ ̪̹͙̫͉̲̤a̟l̦̟̦wá̗̫͕͎͙͍ý͓̤s̴ ͝a̶̮̱̟̫͙ ̯̩̦p̜̣r̗̤͉͝o̖͖̣̤̤̘̣̕b̹͓̞̬̲͕̺l̤͖̲̫e͎̟̤̹͝ͅm̀.̸̮̞̜̖ ͓͍̳̪̟̻͠Tḫ̶̣̤er̳̞̣̥̳e̥̖͎̖̻̼ ̨̻̜̤̻͎̰ͅi̻̖͍̮s͎̱̺̰͈͔̘ ̧̞͖̺̝͙̞͚n̶̩̺͓͎o̥̣̫̬ ̟̯e̜͕̯̮͇̦͡a̹̼̻͙̹s͍̩̞̯̻͖̫y̲̰̥͞ ҉̹͖̭̪͔w̪͘a̭y̧͚͈ ̙̤̥̯̯̹t͍̘̞̳͕̙o̜̹̲͔͡ ͝p͍̺̣̮͢re͎̼̪͉̭̳v͖̕eńt҉̝͈͓̩̪̮̙ ̜͉̜̞ͅa͔̻̠̼̣̻̭l̫̬̥̥͔l͙͇ ̝c̹͔̞̟͇i̩͎̗͇r̺̺̜̰͞c̝̗͎͘u͈͡m͓̻̫͇͔̜͞s̳̖͙ṭ͓̖̘̪͚̫͡a͖̹̪̮̟n̥̜͍̲̼̪̳͢c̺̱͖̪̳̘e̻̼̠̹͙͕s̠̳̼̹̭̻͢.͕̝͉̀ ͚
That said, we could just remove all text above 100 characters.
And then add and ellipsis (…) at the end
That should be fine :)
Yes we need to have something when text is too long.
Added the (...) after 100 characters.
Most helpful comment
T̠͟e͇͍͍̟x̯̝͔͞t̖̥̫͙͓̝̕ ͉͖i̘̦͇ṉ̩̤̫͔̹͜s͙̮͘e̫̰͓̱̥͙r̥̠̤͞ti͓͚o̭̬͓̟͢n̦̞̭̫̹̬ͅ ͕̞i͏̥͇̰s̢͕̣ ̪̹͙̫͉̲̤a̟l̦̟̦wá̗̫͕͎͙͍ý͓̤s̴ ͝a̶̮̱̟̫͙ ̯̩̦p̜̣r̗̤͉͝o̖͖̣̤̤̘̣̕b̹͓̞̬̲͕̺l̤͖̲̫e͎̟̤̹͝ͅm̀.̸̮̞̜̖ ͓͍̳̪̟̻͠Tḫ̶̣̤er̳̞̣̥̳e̥̖͎̖̻̼ ̨̻̜̤̻͎̰ͅi̻̖͍̮s͎̱̺̰͈͔̘ ̧̞͖̺̝͙̞͚n̶̩̺͓͎o̥̣̫̬ ̟̯e̜͕̯̮͇̦͡a̹̼̻͙̹s͍̩̞̯̻͖̫y̲̰̥͞ ҉̹͖̭̪͔w̪͘a̭y̧͚͈ ̙̤̥̯̯̹t͍̘̞̳͕̙o̜̹̲͔͡ ͝p͍̺̣̮͢re͎̼̪͉̭̳v͖̕eńt҉̝͈͓̩̪̮̙ ̜͉̜̞ͅa͔̻̠̼̣̻̭l̫̬̥̥͔l͙͇ ̝c̹͔̞̟͇i̩͎̗͇r̺̺̜̰͞c̝̗͎͘u͈͡m͓̻̫͇͔̜͞s̳̖͙ṭ͓̖̘̪͚̫͡a͖̹̪̮̟n̥̜͍̲̼̪̳͢c̺̱͖̪̳̘e̻̼̠̹͙͕s̠̳̼̹̭̻͢.͕̝͉̀ ͚
That said, we could just remove all text above 100 characters.
And then add and ellipsis (…) at the end