13 month old sleep issues!!

[Charly28]

My son is 13months, he has always been a good sleeper through the night, But recently he will have his bedtime bottle and i will put him down in his cot, he will sleep from an hour to 2 hours then wake up suddenly standing up in his cot, i comfort him back to sleep but he wont go back in his he will cry until i lay him in bed with me. I have tried goving him my pillow blankets to make it cosy but nothing seems to be working?? Any ideas...

[Charly28]

My son is 13months, he has always been a good sleeper through the night, But recently he will have his bedtime bottle and i will put him down in his cot, he will sleep from an hour to 2 hours then wake up suddenly standing up in his cot, i comfort him back to sleep but he wont go back in his he will cry until i lay him in bed with me. I have tried goving him my pillow blankets to make it cosy but nothing seems to be working?? Any ideas...