i got spawned though the stronghold portal and into the void. seed -1429849869 coordinates of portal 1019, 36, 623

I was in my way back from mining and getting seeds for my end house and as I went through the stronghold portal it took a little longer than it should have and then i got spawned though the portal and into the void where I tried to use my elytra to make it but I didn't react quick enough and ended up dying with all my loot i've been collecting for the past 2 weeks just wondering if there is anything I could do to prevent this from occurring again. I also would like to add that this was a completely survival world with no cheats on and this is my first and last time hopefully coming across this bug. seed -1429849869
coordinates of portal 1019, 36, 623