MC-257592 was fixed in 1.19.3 but with a new bug. If you reignite the portal again too quickly, the portal will turn off again. You need to wait a little bit. To reproduce build a nether portal, then extinguish it with a splash water bottle and then quickly reignite it again. It will instantly turn off. If you then do it again, it stays lit.
MC-258431
Reigniting a nether portal after extinguishing it with a splash water bottle too quickly extinguishes it again
Resolved
Invalid
0
Thank you for your report!
However, this issue is Invalid for the bug tracker.
Nether portals cannot be deactivated using splash water bottles; this was never a feature and still isn't a feature in the present versions of Minecraft as shown in the video attachment I've provided. This behavior is likely occurring as a result of the mods you're using.
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