Fixed for v3.0.1

Increase retry counter

scoreboard players add #temp_1 cob.block 1

Clear previous failure state

tag @s remove fail

Invalid spawn block

execute if block ~ ~-1 ~ #obs:spawn_check run tag @s add fail

Too many attempts

execute if score #temp_1 cob.block matches 41.. run tag @s add fail

Retry trader spawn

execute if entity @s[tag=ob.trader_spawn,tag=fail] if score #temp_1 cob.block matches ..40 run function obs:random_trader

Retry visitor spawn

execute if entity @s[tag=ob.visitor_spawn,tag=fail] if score #temp_1 cob.block matches ..40 run function obs:visitor_spawn

Cleanup failed marker

kill @s[tag=fail]

Reset counter

scoreboard players set #temp_1 cob.block 0