What cultural faux pas should I try to avoid making in Opatija?

"When visiting Opatija, it's important to respect the local customs and traditions to avoid any cultural faux pas. Firstly, avoid discussing sensitive topics such as the Yugoslav Wars and the country's political history. These topics can stir up strong emotions and it's best to steer clear of them unless initiated by a local. Secondly, Croatians are generally quite religious, with a majority being Roman Catholic. Therefore, it's important to show respect towards religious customs and institutions. For instance, when visiting churches, dress modestly and maintain a quiet demeanor. Thirdly, punctuality is highly valued in Croatia. If you're invited to someone's home or a meeting, make sure to arrive on time. Being late can be seen as disrespectful. Fourthly, Croatians are proud of their language and culture. Try to learn a few basic phrases in Croatian. Using them will show your respect and appreciation for their culture. Lastly, tipping is customary in Croatia. In restaurants, it's common to leave a tip of around 10% of the bill. However, tipping is not mandatory and is left to your discretion. Remember, the key to avoiding cultural faux pas is to be respectful and mindful of the local customs and traditions," remarked another expat in Opatija, Croatia.