I looked at a bamboo job that went terribly wrong. It was installed along during a remodel. Home was put for sale and the heat was turned off. It was for sale for almost a year.
The new owners called me to look at some severe buckling. I told them if the heat was turned off for a year, the best they could do immediately was to turn the heat on to 65 or 67 and I'd return when I had time to remove base and do some relief cuts at the walls.
They called 4 or 5 hours after the heat was turned on and said it was noticeably worse.
Just like all materials, they expand with heat. There were two reasons for this.
One, the room was 41 feet long and the planks ran the short way instead of lengthwise.
The other issue of expansion on this severely buckled floor was that there were three of those low, wall mounted Cadette type wall heaters throughout the area. Those can blow a little heat directly onto the floor surface.
Over time, as the floor started drying out, the boards would have shrunk back and the buckling would go down............ this however would take weeks or months. The heat
expansion was just the opposite and happened immediately, and long before any moisture would be driven out.