Personally I would consider that not a glitch, according to google, a "Game glitches refer to unexpected software errors or flaws within video games that result in unintended behavior or graphical anomalies. These anomalies range from minor visual hiccups to game-breaking issues hindering progress." Basically the community has to decide if the space being left being is a flaw or not since it is definitely not a software error.

Mobile is a different game. Eternal Senia: Hydragenia after the rain. Which does not have a speedrun section yet I believe.