The International Federation for Human Rights has issued a press release on the rise in Article 112 arrests and prosecutions:
According to information complied by TLHR, between 24 November 2020 and 16 June 2022, 201 individuals – including 16 children – have been charged under Article 112, which imposes jail terms for those who defame, insult, or threaten the King, the Queen, the Heir to the throne, or the Regent. Those found guilty of violating Article 112 face prison terms of three to 15 years for each count. Some lèse-majesté defendants face numerous prosecutions and prison sentences ranging from 120 to 300 years.
It goes on to observe:
Various United Nations (UN) human rights monitoring mechanisms have repeatedly expressed concern over Thailand’s lèse-majesté prosecutions and the severe application of Article 112. They have also called for the amendment or repeal of Article 112.
Since August 2012, the UN Working Group on Arbitrary Detention (WGAD) has declared the deprivation of liberty of nine lèse-majesté detainees to be “arbitrary” because it contravened several provisions of the Universal Declaration of Human Rights (UDHR) and the International Covenant on Civil and Political Rights (ICCPR), to which Thailand is a state party. Eight of those detainees were released after serving their jail terms, while the ninth, Anchan Preelerd, remains incarcerated.
The arrest and prosecution of children under Article 112 is also inconsistent with Thailand’s obligation under international law. Article 13(1) of the UN Convention on the Rights of the Child (CRC), to which Thailand is a state party, stipulates that children have the right to freedom of expression, including freedom to seek, receive, and impart information and ideas of all kinds. Article 37(b) of CRC states that children should not be deprived of their liberty arbitrarily and that the arrest, detention, or imprisonment of children should be used as a measure of last resort.
Update: A reader comments:
Political Prisoners in Thailand 
Regarding the last sentence: I think that the powers that be are at the point of thinking that this is their last resort to maintain in power. They are increasingly feeling threatened and they will resort to ever increasingly irrational methods to stay in power.