I have had some villagers surrounded by blocks and went afk, when I came back they were converted to witches.

I had dirt blocks above them and surrounding them and they were sitting in minecarts

Can lightning strike through beds or half slabs?
 
Server thread/INFO
 14:14:34
Villager bdp['Villager'/443, l='ServerLevel[world]', x=1141.52, y=70.40, z=-565.21]: was struck by lightning aox['Lightning Bolt'/30749, l='ServerLevel[world]', x=1139.50, y=74.00, z=-564.50].
Villager bdp['Toolsmith'/445, l='ServerLevel[world]', x=1141.26, y=70.40, z=-566.81]: was struck by lightning aox['Lightning Bolt'/30749, l='ServerLevel[world]', x=1139.50, y=74.00, z=-564.50].
 
Villager bdp['Villager'/447, l='ServerLevel[world]', x=1138.88, y=70.40, z=-566.91]: was struck by lightning aox['Lightning Bolt'/30749, l='ServerLevel[world]', x=1139.50, y=74.00, z=-564.50].