After sleeping with a Vanilla Bed and getting up, the player is unable to pass through any door, or any space that is 2 blocks tall. The player can only pass through 3 blocks tall holes. The player can not pass through 2 blocks tall holes even while crouching. This happens even if Somnia is the only mod installed, and only happens after waking up from a Bed with Somnia. The only way i found to pass through 2 blocks tall holes after waking up is to install the Smart Moving mod and lay prone, crawling through it.
After sleeping with a Vanilla Bed and getting up, the player is unable to pass through any door, or any space that is 2 blocks tall. The player can only pass through 3 blocks tall holes. The player can not pass through 2 blocks tall holes even while crouching. This happens even if Somnia is the only mod installed, and only happens after waking up from a Bed with Somnia. The only way i found to pass through 2 blocks tall holes after waking up is to install the Smart Moving mod and lay prone, crawling through it.