The most common reason for damage on furniture is that the air contains too little moisture.
Warm air has an ability to hold more moisture than cold air.
Air always strives to become saturated. This means when air in a building heats up, it takes moisture from surrounding hygroscopic objects such as wood and textiles. Contracting causes more harm than expanding in most cases, if the wood is constrained it can split under a low RH level. A high RH level for a longer period, will provide a climate for mold growth and insect infestation. Wood never loose its ability to move.